diff --git a/t07numberpatterns_powers3.py b/t07numberpatterns_powers3.py
index 5a37548..18f9af7 100644
--- a/t07numberpatterns_powers3.py
+++ b/t07numberpatterns_powers3.py
@@ -1,8 +1,8 @@
 # Generate powers of 3 from 1 to 13
 
-START = 
-END = 
-num = 
+START = 1
+END = 13
+num = 3
 
 for i in range(START, END+1):
     print(, end=' ')